package com.my.oschina.fragment;

import java.util.ArrayList;
import java.util.List;

import android.os.AsyncTask;
import android.os.Bundle;
import android.text.format.DateUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;

import com.actionbarsherlock.app.SherlockListFragment;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnLastItemVisibleListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.my.oschina.R;
import com.my.oschina.adapter.ListViewFavoriteAdapter;
import com.my.oschina.app.AppContext;
import com.my.oschina.app.AppException;
import com.my.oschina.bean.FavoriteList;
import com.my.oschina.bean.FavoriteList.Favorite;

/**
 * 收藏
 * 
 * @author XuShaoJie
 * @version 2013-06-28
 */
public class FavoriteFragment extends SherlockListFragment {

	private int mInstance = -1;

	private PullToRefreshListView mPullRefreshListView;
	private ListViewFavoriteAdapter mNewsAdapter;
	private List<Favorite> lvNewsDataList = new ArrayList<Favorite>();
	private int lvSumData;// 加载的总数目

	private AppContext appContext;// 全局Context

	/**
	 * 返回FavoriteFragment实例
	 * 
	 * @param type
	 *            加载数据的类型
	 * @return FavoriteFragment实例
	 */
	public static FavoriteFragment newInstance(int type) {
		FavoriteFragment ff = new FavoriteFragment();
		Bundle bundle = new Bundle();
		bundle.putInt("type", type);
		ff.setArguments(bundle);
		return ff;
	}

	public int getArgumentsType() {
		return getArguments().getInt("type", FavoriteList.TYPE_SOFTWARE);
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		appContext = (AppContext) getSherlockActivity().getApplication();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		if (savedInstanceState != null) {
			mInstance = savedInstanceState.getInt("mInstance");
		}
		View view = inflater.inflate(R.layout.activity_ptr_list, container,
				false);
		mPullRefreshListView = (PullToRefreshListView) view
				.findViewById(R.id.pull_refresh_list);
		mPullRefreshListView.setMode(Mode.BOTH);
		return view;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);

		// Set a listener to be invoked when the list should be refreshed.
		mPullRefreshListView
				.setOnRefreshListener(new OnRefreshListener<ListView>() {
					@Override
					public void onRefresh(
							PullToRefreshBase<ListView> refreshView) {
						String label = DateUtils.formatDateTime(appContext,
								System.currentTimeMillis(),
								DateUtils.FORMAT_SHOW_TIME
										| DateUtils.FORMAT_SHOW_DATE
										| DateUtils.FORMAT_ABBREV_ALL);

						// Update the LastUpdatedLabel
						refreshView.getLoadingLayoutProxy()
								.setLastUpdatedLabel(label);

						if (mPullRefreshListView.getCurrentMode() == Mode.PULL_FROM_START) {
							lvNewsDataList.clear();
							lvSumData = 0;
							mNewsAdapter.notifyDataSetChanged();
						}

						// 加载数据异步处理任务
						new GetFansTask().execute();
					}
				});

		mNewsAdapter = new ListViewFavoriteAdapter(getSherlockActivity(),
				lvNewsDataList, R.layout.favorite_listitem);
		mPullRefreshListView.setAdapter(mNewsAdapter);

		// TODO 第一次启动时候加载数据
		new GetFansTask().execute();

	}

	/**
	 * 加载数据AsyncTask
	 */
	private class GetFansTask extends AsyncTask<String, Void, FavoriteList> {

		@Override
		protected FavoriteList doInBackground(String... params) {
			// 当前pageIndex
			int pageIndex = lvSumData / 20;
			int type = getArgumentsType();
			try {
				return appContext.getFavoriteList(type, pageIndex, true);
			} catch (AppException e) {
				e.printStackTrace();
			}
			return null;
		}

		@Override
		protected void onPostExecute(FavoriteList result) {
			super.onPostExecute(result);

			List<Favorite> friendList = result.getFavoritelist();
			// 加载成功且如果有数据
			if (result != null && friendList.size() > 0) {

				lvSumData += friendList.size();
				lvNewsDataList.addAll(result.getFavoritelist());
				mNewsAdapter.notifyDataSetChanged();
				// Call onRefreshComplete when the list has been refreshed.
				mPullRefreshListView.onRefreshComplete();

				if (friendList.size() < 20) {
					mPullRefreshListView.setMode(Mode.PULL_FROM_START);
					// 添加监听器
					mPullRefreshListView
							.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {
								@Override
								public void onLastItemVisible() {
									Toast.makeText(getSherlockActivity(),
											"已加载全部", Toast.LENGTH_SHORT).show();
								}
							});

				} else if (friendList.size() == 20) {
					mPullRefreshListView.setMode(Mode.BOTH);
					// 取消监听
					mPullRefreshListView.setOnLastItemVisibleListener(null);
				}
			}
			// 加载失败或者没有数据
			else {

			}
		}
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putInt("mInstance", mInstance);
	}

}
